forces

Question 1

vector

Answer 1

magnitude and direction

Question 2

scalar

Answer 2

magnitude

Question 3

resultant force

Answer 3

overall force acting on an object

Question 4

energy transferred means there is ____ done

Answer 4

work

Question 5

elastic limit

Answer 5

when something is stretched too far and can’t return to the same shape

Question 6

acceleration formula

Answer 6

△v / t

Question 7

speed of sound in air at different temperatures

Answer 7

0°C = 331m/s
20°C = 346 m/s
100°C = 386 m/s

Question 8

What is a joule?

Answer 8

energy transferred (work done) when a force of 1N causes an object to move 1m

Question 9

Newton’s 1st Law

Answer 9

an object will remain at rest or continue at constant velocity unless a resultant force acts

resultant force of 0= constant speed

Question 10

Newton’s 2nd Law

Answer 10

the acceleration of an object when a resultant force acts is proportional to its mass

Question 11

Newton’s 3rd Law

Answer 11

if body A exerts a force on body B, then B will exert and equal and opposite force on A

Question 12

momentum formula

Answer 12

momentum = mass x velocity

Question 13

force formula

Answer 13

F = m x a
mass x acceleration

Question 14

what is the speed of light?

Answer 14

3 x 10 ^8 m/s

waves travel at this speed through a vacuum or through air

Question 15

Sievert

Answer 15

measure of the human response to radiation

Question 16

order of electromagnetic spectrum

Answer 16

[LONG WAVELENGTH] radio wave, micro wave, infared wave, visible light, UV, X ray, gamma [SHORT WAVELENGTH]

short wavelength= more damaging because of higher frequency